1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f83c5e6d13eac0924a410dfa7d5afd16181b0a077986954603c4868acdc2d1d. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25320fa9-a10a-4332-b901-81b3954d5925.json and https://artists.proofprofile.net/proofs/artist/25320fa9-a10a-4332-b901-81b3954d5925.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc9b0911c6e13eca2ef81f1f666070a53b0e8cd6eeb3e802b1ca03ab9a6c015. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ff3d029ec08b3034f791a3864c5d34cd81a89654d73ae1e5561f1238d9b556. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de1f2940424708580dee18727325be21aede28e79175f78af53e90c5dcb9cd5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742d29cf0246f80eec192cab7660cc3ff8fa3f1a4495663ae9e7c9a418e0c8d1. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00f9dd05b8856d2319ea07eb44076947bcb9481ff7b0070aadae19675f53f95. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c01f75947d76bb2242a6fc20844a3a61c2027f600c442c3d751878d48d15491. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW1800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab5525f00cc75269832f84b9dc2f1ccaaa5b7ea95f67442fb8ce9fa50746649. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ea2b95ec79f2c00ffd4678c11e39d5a210bdd6b9447753c568e4ff3cacbe97. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b036b0f7dd72e9fcdac09e402881e2ad6ca23ab32a3311fd558b060e17c829. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82138630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8983104b4694cb0c7a4a283fb82aa68cdf66cceb4b311faf65b60c7cc5048a1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e7afc0019d776946ed75b7bc2bb3c5568954a1ddd24a355c7a995b567d8397. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb336fbe284a21d33cf175981160e157a456eb740cf3ff540f91d91341cff71ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa262322954552c7b8ec1cb597a89e2a1ee57433fa982562b6ff4247d21146080. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW2100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b66c0d2a37932199387714fcc0799b7ffcc5d3ab0c4448e791b21abfbc1787f. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe250a60a329fdb6ffe1c6335ceb1d1882ed61177dfd2dc90db095e7e4d77dda9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb336fbe284a21d33cf175981160e157a456eb740cf3ff540f91d91341cff71ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUENW2100040.